Car-truck.



. G. K. THOMPSON. ma mum.- APPLICAUQN. EILED JUNE 2 I915.

1 138% Patented Jan. 9,1917.

2 SHEETS-SHEET 1.

I G. K. THOMPSON.

CAR TRUCK. APPLICA'LON FILED JUNE 2, 1915.

2 SHEETSSHEET 2- nsfiwxu' a $2 N attain;

Patented Jan. 9, 1917.

v'designated 1 is provided,

cal bearing collar 3, in extending'slots 4. are provided, as illustratedGEORGE K. THOMPSON, OF NEW YORK, N. Y.

cm'mucx Specification of Letters Patent.

Patented Jan. 9, 1917.

Application filed June 2, 1915. Serial No. 31,723.

To all whom it may concern:

Be it known that I, GEORGE K. .THoMrsoN, a citizen of the United States,residing at New York, in the'county of New York and State of New York,have invented certain new and useful Improvements in Car- Trucks, ofwhich the followingis a specification.

This invention relates to car trucks and has primarily for an object toreduce jar and vibration of the rolling stock to a minimum.

Another object of the invention is to equalize the pressure of therolling stock to prevent the thrust from being continuously exerted onone particular point, thereby preventing any part from being prematurelyrendered unsuitable for use.

A further object is to maintain the equilibrium ofthe rolling stock atall times, even in the event of undue pressure being exerted on aspecific portion of the truck, and to absorb shock occasioned byinequalities of the rails.

Other objects as well as the nature, characteristic features and scopeof my invention will be more readily understood from the followingdescription taken in connection with the accompanying drawings andpointed out in the claims forming a part of this specification. 1

Referring to the drawings; Figure 1 is a transverse sectional view of acar truck constructed in accordance with my invention, Fig. 2 is a sideelevational view of the same, a portion of one of the levers being shownin section, 'Fig. 3 is a top plan view of my improved device, portionsthereof being broken away and portions being shown in section todisclose details, Fig; 4: is a top plan view of one of the supportingyokes used in this invention, and Fig. 5 is a detail enlargedfragmentary side elevational view of one of the truck bolsters,illustrating to advantage the anti-friction means therein.

In the drawings, a truck frame generally which in the present instance,comprises a bolster 2 of the skeleton type. The bolster is formedintermediate its ends to provide a cylindriwhich longitudinally toadvantage in Flg. 1. The top of the bolster 2 is provided withsubstantially semi-ovoid openings 5 on the opposite sides of the collar3, the inner terminal of each of which communicateswithone of the slots4. The opposite ends of the bolster 2 are in engagement with side frames6, the oppositeend of each of which is engaged with a journal box 7. Theupper marginal edge of each of the side frames 6, approximately midwaythe ends thereof, is provided with a depressed portion 8, having sideflanges 9 formed at the opposite sides thereof. The opposite ends of theside frames 6 have axles 10 journaled therein in the usual manner withthe terminalsthereof engaged in the journal boxes 7, while wheels 11 aremounted X13011 the axles in the usual manner.

sociated with the truck bolster 2, each of which in the present instance1s of a subthe stantially semi-ovo1d configuration, apices of which arearranged to lie in proximity to each other, and having extendedtherefrom arms 13 and 14, the latter having its free terminalbifurcated; adapted'to receive the free terminal of the arm 13 betweenthe branches thereof. The arms 13- and 14 are slidably arranged in theslot 4: of the collar 3, the being pivotally engaged with a pin 15. Thecantalivers 12 are mounted in the semi-ovoid openings 5 of the truckframe 1 and are of an arcuate configuration. The outer terminal of eachof the cantalivers is provided with an opening 16, which as shown toadvantage in Fig. 1, increase in width from the upper marginal edges ofthe levers to the lower marginal edges thereof, thereby permittingmovement of the levers in a 'vertical are at their proximate terminals,in

of the be noted that each of the is arranged through its re- 12,adjacent the lower marview of the pivotal axis 17 of each levers. Itwill pivot pins 17 spective lever ginal edge of possibility of minimum.

, A supporting yoke 18 depends, on eachweakening the levers to a pair ofcantalivers 12 are movably asfree terminals thereof, 7

the latter, thereby reducing v side of the truck 1, from the side-sill19 and the body bolster 19 of the car body and comprises parallellyarranged bars 20, which are spaced from each other and which areenlarged approximately midway their ends to provide ears 21, the latterbeing provided with alining openings 22, therein. The outer terminals ofthe bars 20 have plates 23 formed thereon which are adapted for snugengagement with the lower face of the sidesill 19 and are held in snugengagement therewith by bolts or other suitable fastening means. -Itwill be noted that the bars 20 are arcuate, and are dependedsufiiciently far so as to dispose the ears 21 thereof substantiallyparallel-with the depressed portions 8 in the side-frames 6.

A link 24 is mounted througheach of the openings 16, and is provided,adjacent its opposite ends, with openings 25, the upper of each of saidopenings having a pivot pin 26 mounted therethrough, the opposite endsof which project beyond the lateral faces of the link, and are engagedin complemental recesses in the upper margins of the cantalivers 12, onthe opposite sides of the openings 16. The opemng in the lower end ofeach of the links 24 is alined with the opening 22 in the ears of theyokes 18, a pivot pin 27 being engaged through said alining openings, asillustrated'to advantage in Fig.

1. It will be noted that each of the links 24 is movably mounted in acorresponding recess in the body bolster 19, a portion of the latterbeing broken away in Fig. 1 to disclose this formation.

Upon reference to Fi 5 of the drawings,

2 it will be noted that a rib 28 is formed upon the inner periphery ofthe collar 3, adjacent the lower end of the latter and is providedtherein with recesses 29, which form; ball races for the anti-frictionballs collar 3 of the bolster 1, the upper end there of being enlargedand in engagement with the sills 33 of the car body, whereby pressure onthe car body is imparted to the cylinder 32. The outer periphery of saidcylinder is engaged with the anti-friction balls of the ribs 28 and 31,.in order to facilitate movement of the cylinder in said collar. Thecylinder is provided with diametrically opposlte longitudinallyextending slots 34' therein, which aline with the slots '4 in the collar3, asillustrated to advantage in Fig.

1. The arms 13 and 14 of the cantalivers 12 are passed through .theslots 34 in the cylinder 32 and likewise through longitudinallyextending slots 35 in a piston 36, the latter being movably mounted inthe cylinder '32. The cylinder 32 is provided with registering slots 37which extend longitudi- .nally in said cylin er and in which theopposite ends of the in 15 are movably mounted, said pin being arrangedthrough registering openings in the piston 36 to operate the lattersimultaneously with the movement of the cantalivers- 12. It will benoted that the slot-37 in the cylinder 32 opens through the lowerterminal of said cylinder, thereby facilitating assemblage of the parts,since the pin may be inserted therein, and removed therefromexpeditiously. The'proximate ends of the arms 13 and 14 are enlarged toprovide cam-shaped peripheries, which project into the piston 36, saidenlarged portions being provided with registering slots 38 thereintopermit relative movement of said arms when pressure is exerted on theopposite ends of the cantalivers.

An elastic element or shock absorbing means 39 is mounted in thecylinder 32, which in this instance comprises a coilspring,.theuppermost convolution of which is in engagement with the upper end ofthe cylinder 32, while the lowermost convolution is in engagement withthe upper .end of the piston 36. It will therefore be seen that pressureon the outer end of either of the cantalivers. 12 will be absorbed bythe spring 39, whereas pressure 'on the car body will likewise be takenup by said spring by movement of the cylinder 32 toward the piston 36.

In operation therefore, it will be seen that should undue pressure beexerted upon one side of the car body, as by. the shifting of thecontents of the car body when rounding a sharp curve or the like, theundue pressure which is exerted on this side of the car will bedistributed to the center'and opposite side of the car, in view of themech anism of my invention heretofore described. Assuming that unduepressure is exerted upon one side of the car, it will of course beobserved that the cantaliver subjacent the lightest side of the car willbe operated so as to impart movement to the pin 15, thereby operatingthe piston 36 in the cylinder 32 and likewise imparting movement to theopposite cantaliver. Assuming that pressure is normally exerted upon theentire car body, any jar or vibration of the rolling stock will be takenup, since the movement of the car body will be transmitted through thesills 33 to the cylinder 32, thereby moving the latter in the collar "3against the resistance of the spring 39. It is moreover to be noted thatpressure will be exerted upon every single point of the car truck,immaterial of what point undue pressure is applied in the car body.

'It will be understood that ,the above description and accompanyingdrawings comprehend only the general and preferred embodiment of myinvention and that various minor changes in details of construction,proportioned and arrangement of parts may be made within the scope ofthe appended claims without sacrificing any'of the advanta es of myinvention.

aving thus fully described my inven tion, what I claim as new and desireto secure by Letters Patent is:

1. In combination with a car body and truck, mechanism carried by thetruck to distribute undue pressure applied to either side of the latter,and means cooperating the truck and wheels thereof, means cooperativebetween the body and truck to distribute undue pressure exerted at anypoint on the truck from the body and means in connection with the bodyand coacting with the first-named means but operable independently ofthe latter to take up jar from the body.

4. In combination with a car body and truck having a frame movable withrespect tothe journals of the truck, a cantaliver mechanism associatedwith said truck and pivoted to the latter independently of pivotalconnection with the body at the center.

thereof and in connection with the car body at the sides and resilientmeans between the center of the car and the cantaliver mechanism todistribute pressure equally to the truck, immaterial of the portion ofthe body to which the pressure is applied.

5. In combination with a car body and truck, a cantaliver mechanismassociated With said truck and in connection with said body to equallydistribute pressure of the latter to the truck, and an elastic elementfor absorbing shock from said cantalivers.

6. In combination with a car body and truck, 'a cantaliver mechanismassociated with said truck and in connection with said body todistributepressure of the latter, for equalizing strain on the truck, a shockabsorbing means for said cantalivers, and means movably associated withthe truck and coacting with said cantalivers, but movable independentlyof the latter for equalizing pressure on'the truck. 7. In combinationwith a rigid car body and the sills thereof; of a truck having a frameand turning means associated there with in conjunction with the body,cantalivers pivoted to the stationary truck at points remote from theirinner ends, hangers dependent from the sills at the sides of the body,said cantalivers movably engaging in said hangers, links between thehangers and cantaliver-s and adapted to have lateral and longitudinalplay, and spring means between the inner ends of the levers and thebody.

In testimony whereof I aflix my signature in presence of two witnesses.-GEORGE K. THOMPSON. .Vitnesses:

ELIJAH W.. SELLs, CHAs. S. LEEDLANE.

